Process for preparing tetra and hexahydro-5-sulfonyl-2,5-benzodiazocines



United States Patent 3,496,164 PROCESS FOR PREPARING TETRA AND HEXA- HYDRO-S-SULFONYL-Z,S-BENZODIAZOCINES Dong Hans Kim, Stratford, Arthur A. Santilli, Havertown, Theodore S. Sulkowski, Narberth, and Scott J. Childress, Philadelphia, Pa., assignors to American Home Products Corporation, New York, N.Y., a corporation of Delaware No Drawing. Filed Sept. 26, 1966, Ser. No. 581,750 Int. Cl. C07d 53/00; C07c 143/72; A61k 27/00 US. Cl. 260239 14 Claims ABSTRACT OF THE DISCLOSURE A method for preparing compounds of the formula SO2R4 r r R3 1 R2 where R R are as defined below, by (a) condensing a 2-bromomethyl benzoyl compound with a N-acetyl-N- sulfonylethylenediamine in an alkanoyl in the presence of an alkaline alkylating agent at a temperature of 6090 C. for one-half to five hours; (b) deacylating the reaction product by contact with the mineral acid at reflux temperature for three to eight hours; (c) neutralizing the reaction product and (d) cyclodehydrating the reaction product by contact with pyridinehydrochloride in pyridine at reflux temperature for twenty to forty hours.

This invention relates to a new and novel process for the preparation of hexahydro-2,5-benzodiazocines, as Well as to novel intermediates. In particular, the present invention is concerned with new and novel N-[Z-(N-[Z-carbonylbenzyl] sulfonamido)ethyl]amides; N [2 aminoethyl] N [2 carbonylbenzyl]sulfonamides; 5 sulfonyl tetrahydro 2,5 benzodiazocines and 5 sulfonylhexahydro-2,5-benzodiazocines having value as intermediates in the novel process for the synthesis of hexahydro- 2,5-benzodiazocines which are known to possess pharmacological properties.

The new and novel compounds of this invention are represented by the following formulae:

3,496,164 Patented Feb. 17, 1970 ice and

S|02R4 N wherein R is selected from the group consisting of phenyl, lower alkoxyphenyl, nitrophenyl, aminophenyl, halophenyl, halo (lower) alkylphenyl, thienyl, and furyl; R and R are both selected from the group consisting of hydrogen, halogen, lower alkoxy, nitro, amino, and halo(lower)- alkyl; R; is selected from the group consisting of lower alkyl, phenyl, lower alkylphenyl, lower alkoxyphenyl and halophenyl; R is selected from the group consisting of hydrogen and lower alkanoyl; and the acid addition salts thereof, with the proviso that for compounds of structural Formula C the definition of R does not include nitrophenyl and the definitions of R and R do not include nitro.

The new compounds represented by structural Formula A, when R is lower alkanoyl, properly are called: N-[2- (N [2 carbonylbenzyl] sulfonamido)ethyl]amides. Typical examples thereof are N-[2-(N-[2-(4-chlorobenzoyl benzl] -4-tolylsulfonamido ethyl] acetamide N- [2- (N [2 (4-chlorobenzoyl)benzyl]-phenylsulfonamido)- ethyl] acetamide; and N [2 N [2 (4-bromobenzoyl) benzyl] 4 bromophenylsulfonamido)ethyl]acetamide. When R is hydrogen, the compounds of Formula A are named: N [2 aminoethyl] N [2 carbonylbenzyl]sulfonamides, examples thereof are N-[2-aminoethyl] N [2 (4 chlorobenzoyl)benzyl]benzenesulfonamide; N [2 aminoethyl] N [2 (4 chlorobenzoyl)benzyl] 4 toluenesulfonamide; and N [2- aminoethyl] -N- [2-benzoylbenzy1] -propanesulfonamide.

The new compounds designated by structural Formula B are named "5-sulfonyl-tetrahydro-2,5-benzodiazocines, such as, l (4 chlorophenyl) 3,4,5,6 tetrahydro 5 phenylsulfonyl 2,5 benzodiazocine; 1 (4- chlorophenyl) 3,4,5,6 tetrahydro 5 (4 tolylsulfonyl) 2,5 benzodiazocine; and 3,4,5,6 tetrahydro 1- phenyl 5 propylsulfonyl 2,5 benzodiazocine. Alternatively, when the new compounds are depicted by structural Formula C, they are designated as 5-sulfonyl hexahydro 2,5 benzodiazocines, such as, 1 (4- chlorophenyl) 1,2,3,4,5,6 hexahydro 5 phenylsulfonyl 2,5 benzodiazocines; 1 (4 chlorophenyl)- l,2,3,4,5,6 hexahydro 5 (4 tolylsulfonyl) 2,5- benzodiazocine; and 1,2,3,4,5,6 hexahydro 1 phenyl- S-propylsultonyl-Z,S-benzodiazocine.

In accord with the process of the present invention, the novel compounds thereof and the prior art hexahydro- 2,5 benzodiazocines are synthesized by the following schematic sequence of reactions:

/\ gleam (l) S 02134 R0 CHzBl' Alkylation Ra CHzNCHzCHzNHCR HNCHZOHQNHCR R: R2

1&1 R1

Deacylation Neutralization S 0 2R4 Cyclodehydration R CHZN C C HZN o 2 l R 1 Bi (III) (II) l Hydrogenation S 02R: I? I N R Desulfonatiou R N N I l l R] H R1 H wherein R is alkyl and R R R and R are defined as above, with the proviso that for the above designated 5- sulfonyl-hexahydro-2,S-benzodiazocines (IV) and hexahydro-2,5-benz0diazocines (V) the definition of R does not include nitrophenyl and the definitions of R and R do not include nitro.

The alkylation reaction between approximately equimolar amounts of a Z-bromomethyl benzoyl compound and an appropriate N-acyl-N-sulfonylethyleuediamine is efiected by heating a mixture of these reactants in an alkanol in the presence of an alkaline alkylating agent at a temperature from about 60 C. to about 90 C. for a period of from about one-half hour to about five hours. Preferably, this reaction is conducted at about the reflux temperature of the reaction mixture for about one hour. After the reaction is complete, the reaction mixture is cooled, the resulting N-[Z-(N-[Z-carbonylbenzyl]-sulfonamido)ethyl] amide (I) is obtained by conventional methods, such as filtration, concentration, alkalinization, extraction and crystallization.

Deacylation of an above prepared N-[Z-(N-[Z-carbonylbenzyl]-sulfonamido)ethyl]amide (I) is accomplished by contact with a mineral acid at about reflux temperatures for a period of from about three to about eight hours. Preferably, this reaction is conducted in about to about percent (v./v.) sulfuric acid. When the deacylation reaction is complete, the product is separated by filtration, and neutralized with a base to yield a N-[2- aminoethyH-N-[2-carbonylbenzyl] sulfonarnide (II). Preferably, this neutralization is conducted with sodium or potassium hydroxide at about steam bath temperatures for approximately fifteen minutes. Alternatively, the deacylation reaction may be carried out by use of basic hydrolytic agents, such as sodium hydroxide, preferably by refluxing the N [2 (N {2 carbonylbenzyl]-sulfonamido)ethyl] amide (I) in ethanolic sodium hydroxide (5 percent w./v.) for several hours.

The above prepared amine (II) is cyclodehydrated by admixture with pyridine hydrochloride, in pyridine at about reflux temperatures for a period of about twenty to about forty hours. When the cyclodehydration reaction is complete, the resulting 5-sulfonyl-tetrahydro-2,5-benzodiazocine (III) is separated and purified by concentration, extraction, reconcentration and crystallization. Suitable solvents for these purposes Will readily suggest themselves to those skilled in the art of chemistry.

Hydrogenation of an above prepared 5-sulfonyl-tetrahydro-2,5-benzodiazocine (III) may be accomplished by contact with hydrogen, in the presence of a catalyst, such as platinum oxide, palladium and the like. Alternatively, this hydrogenation may be conducted by contact with chemical reducing agents, for example, lithium aluminum hydride and dimethylamineborane. Preferably, this reaction is conducted, in an alkanol by contact with hydrogen, in the presence of a catalytic amount of platinum oxide. When the reduction is complete, the resulting 5-sulfonylhexahydro-2,5-benzodiazocine (IV) is separated by standard recovery procedures, for example, filtration, evaporation and crystallization. It should be noted that this hydrogenation reaction will also convert any nitro substituents present on a 5-sulfonyl-tetrahydro-2,5-benzodiazocine (III) to the corresponding amino substituent on the resulting S-sulfonyl-hexahydro-Z,S-benzodiazocine (IV).

The above prepared 5-sulfonyl-hexahydro-Z,S-benzodiazocine (IV) may be desulfonated by admixture with concentrated sulfuric acid (about to about 100 percent sulfuric acid). Preferably, this reaction is conducted by admixture with about percent sulfuric acid which is warmed until a clear solution forms and is then allowed to stand at approximately room temperature for a period of about one-half hour to about five hours. When the desulfonation reaction is complete, the heXahydro-LS- benzodiazocine (V) is recovered by conventional means, such as neutralization and recrystallization from an appropriate organic solvent, such as ether, chloroform and toluene.

Since many of the compounds prepared by the present invention are basic, advantage may be taken of the Water solubility of salts of these compounds formed with acids in the isolation and/or purification of the above compounds and in the preparation of aqueous solutions of these new compounds for oral or parenteral administration. Of course, only salts formed with pharmaceutically acceptable acids should be employed in therapeutic applications. Particularly effective salts are those formed with pharmaceutically acceptable acids having a pK value of 3 or lower. Such acids are well known in the art, for example, hydrochloric, hydrobromic, sulfuric, nitric, phos phoric, benzenesulfonic, toluenesulfonic, methanesulfonic, ethanesulfonic acids and the like. These salts may be prepared by procedures commonly employed in the art, for example, reacting the compounds with an equivalent of the selected acid in aqueous solution and concentration of the solution. Other known procedures may also be employed.

The time and temperature ranges employed in the aforesaid reactions are not critical but simply represent the most convenient ranges consistent with carrying out the reaction in a minimum of time without udue ditficulty. Thus, reaction temperatures appreciably below these can be used, but their use considerably extends the reaction time. Similarly, reaction temperatures higher than those mentioned can be employed with a concomitant decrease in reaction time. By the term alkaline alkylation agent, it is meant to include agents suitable for promoting the aforesaid alkylation reaction, such as alkali metals, their alkoxides and their alkoxyalkoxides. Preferred among those catalysts are sodium hydroxide, potassium hydroxide, sodium methoxide, sodium hydride and sodium ethoxyethoxide.

Many of the reactants employed in the above described process are known compounds which are available from commercial sources, while others can be prepared in accord with well known procedures. The 2-bromomethyl benzoyl compounds which are used as reactants herein are described and claimed in co-filed and co-pending U.S. patent application, Ser. No. 581,751, filed on Sept. 26, 1966, and refiled as Ser. No. 707,971 on Feb. 26, 1968, the parent being abandoned and the continuation-in-part still pending, both being filed by Kim et al., and entitled "Bromomethylbenzophenones and Related Compounds.

In accord with the present invention, the novel N-[Z- aminoethyl] N [Z-carbonylbenzyl]sulfonarnides (II) and the 5-sulfonyl-hexahydro-Z,5-benzodiazocines (IV) herein described have been found to possess interesting pharmaceutical properties which render them useful as synthetic medicinals. More particularly, in standard pharmacological tests, these compounds have been found to have utility as anti-convulsants. Further, the aforementioned N-[Z-(N-[Z carbonylbenzyl]-sulfonarnido)ethyl] amide (I), the N-[Z-aminoethyl] N [2-carb0nylbenzyl] sulfonamides (II), the 5-sulfonyl-tetrahydro-2,5-benz0 diazocines (III), and the S-sulfonyl-hexahydro-2,5-benzodiazocines (IV) have also demonstrated utility as intermediates in the preparation of the pharmacologically active hexahydro-2,5-benzodiazocines (V).

EXAMPLE I To a solution of 17 g. of N-acetyl-N-phenylsulfonylethylenediamine and 4.7 g. of potassium hydroxide (85%) in 70 ml. of absolute alcohol there is added g. of 2'-bromomethyl-4-chlorobenzophenone in small portions with mechanical stirring. The resulting mixture is heated to reflux for minutes and then allowed to cool to room temperature. The precipitated salt is removed by filtration, the filtrate concentrated under reduced pressure and then treated with 100 ml. of 2 N sodium hydroxide solution. The product is extracted with ether. Addition of 150 ml. of water to the ether solution causes the slow separation of a precipitate which is collected by filtration and Washed with ether several times to yield 16 g. of white crystals of N-[2-(N-[2-(4-chlorobenzoyl) benzyl]phenylsulfonamido)ethyl]acetamide, M.P. 10-3- 105 C.

Analysis.Calcd. for C H ClN O S: C, 61.20; H, 4.92; Pl, 5.95; S, 6.81; Cl, 7.54. Found: C, 60.84; H, 4.74; N, 6.15; S, 6.7; Cl, 7.5.

EXAMPLE II To a solution of 7.7 g. of N-acetyl-N'-tosylethylenediamine, 2.02 g. of potassium hydroxide (85%) and 30 ml.

of absolute ethanol, there is added 7.7 g. of 2-bromornethyl-4-chlorobenzophenone in small portions with stirring.

EXAMPLE III The procedure of Examples I and II is repeated reacting an appropriate 2-bromomethyl benzoyl compound with an N-acyl-N-sulfonyl ethylenediamine to produce the hereinafter listed products.

Starting material Product N-[2-(N-[2-benZ0yl-4-bromo benzyl]-methylsulfonamido) ethyl]butyramide.

5-bromo-2-hromomethyl-benzophenone and N-butyryl-N- methylsultonylethylenediamine.

Z-bromomethyl-3-fluorobenzophenono and N-acetyl-N-(4- methoxyphenylsulfonyl) ethylenediamine.

EXAMPLE IV To a solution of 12.0 g. of N-acetyl-N'-propylsulfonylethylenediamine, 2.3 g. of sodium hydroxide and 60 ml. of absolute methanol, there is added 15.0 g. of 2- bromomethylbenzophenone in small portions with stirring. The reaction mixture is then heated to reflux for two hours and cooled to 30 C. Subsequently, the precipitated salt is removed by filtration, the filtrate concentrated under vacuum, treated with 50 ml. of 4 N potassium hydroxide solution, and extracted with chloroform. Concentration of the combined chloroform extracts causes the separation of N-[Z-(N-[Z-benzoylbenzyl] -propylsulfonamido ethyl] acetamide.

In a similar manner, reacting 2-bromomethyl-3',4-dichlorobenzophenone with N-valeryl-N'-(4-chlorophenylsulfonyl)ethylenediamine there is obtained N-[2-(N-[2- (3,4 dichlorobenzoyl )benzyl] 4 chlorophenylsulfonamide) ethyl] valeramide.

EXAMPLE V To a solution containing 3.6 g. of N-acetyl-N-(4- bromophenylsulfonyl)ethylenediamine, 0.6 g. of sodium methoxide and 15 ml. of butanol, there is added 3.6 g. of 2-bromo-4-bromobenzophenone in small portions with stirring. The reaction mixture is heated to reflux for five hours and then cooled to room temperature. The precipitated salt is removed by filtration, the filtrate concentrated under vacuum, treated with 50 ml. of saturated sodium bicarbonate solution, and extracted with benzene. Concentration of the combined benzene extracts causes the separation of N-[2-(N-[2-(4-bromobenzoyl)benzyl]- 4-bromophenylsulfon amido) ethyl] acetamide.

Similarly, N- 2- N- 2- 2,4-dibromobenzoyl benzyl -4- bromophenylsulfonamido)ethyl]propionamide is prepared.

EXAMPLE VI To a solution of 27 g. of N-caproyl-N'-(4-ethoxyphenylsulfonyl)ethylenediamine and 7.5 g. of sodium ethoxide, 250 ml. of absolute ethanol, there is added 34 g. of 2'- bromomethyl 4 trifluoromethylbenzophenone in small portions with stirring. The reaction mixture is then heated to 70 C. for four hours and cooled to 30 C. Subsequently, the precipitated salt is removed by filtration, the filtrate is concentrated under vacuum, and the residue is treated with 1 00 ml. of 2 N sodium hydroxide solution, and extracted with toluene. Concentration of the combined toluene extracts causes the separation of N [2-( N -[2-( 4-trifluoro-methylbenzoyl)benzyl] -4-eth0xyphenylsulfonamido ethyl] caproamide.

In a similar manner, N-[2-(N-[2-(4-dichloromethylbenzoyl)benzyl] ethylsulfonamido)ethyl]acetamide; N-

7 [2 (N [2 furoylbenzyl] phenylsulfonamido)ethyl] acetamide and N [2 (N-[2-theonylbenzoyl]-phenylsulfonamido) ethyl] acetamide are produced.

EXAMPLE VII EXAMPLE VIII When the procedure of the aforementioned examples is employed, reacting an appropriate 2-bromomethyl benzoyl compound, with an N-acyl-N'-sulfonyl ethylenediamine, the following products are obtained.

Starting materials Products N-[2-(N-[2-benzoyl-4-nitrobenzylH-propylphenylsul- 2-bromomethyl-6-ehlorobenzophenone and N-acetyl-N-(4- fluorophenylsulfonyl)ethylenediamine.

2-bromomethyl-5-nitrobenzophenone and N -aeetyl-N (4-propylphenylsulfonyl) fonamido) ethyllaeetamide. ethylenediarm'ne. 2'-bromomethyl4,5diohlor0- N-[2-(N-[2-benozyL4,fi-dibenzophenone and N-butyryl- N( i-methoxyphenylsullony l) ethylenediamine. 2-bromomethyl-4-methoxybenzophenone and N-acetyl-N- phenylsulfonylethylenediamine.

chlorob enz yl]+methoxyphenylsulfonamido) et-hyl1butyramide.

N-[2-(N-[2-benzoyl--rnethoxy benzyllphenylsulfonamido) ethy11aeetamide.

EXAMPLE IX To a solution of 5.3 g. of N-acetyl-N'-phenylsulfonylethylenediamine, 1.9 g. of potassium ethoxide and 30- ml. of absolute ethanol, there is added 6.4 g. of 2'-bromomethyl-4-nitrobenzophenone in small portions with stirring. The reaction mixture is then heated to 75 C. for one hour and cooled to about 20 C. The resulting precipitated salt is removed by filtration, the filtrate concentrated under vacuum, treated with 100 m1. of saturated potassium bicarbonate solution, and extracted with carbon tetrachloride. Concentration of the combined carbon tetrachloride extracts causes the separation of N- [2 (N -[2- (4-nitrobenzoyl)benzyl]phenylsulfonamido) ethyl]acetamide.

Similarly, the following compounds are prepared: N- [2 (N [2 (4 ethoxybenzoyl) benzyl]phenylsulfon amido) ethyl] propiona-mide; and N- [2-(N-[2-(4-dichloromethylbenzoyl)benzyl] 4-tolylsulfonamide)ethyl] butyramide.

EXAMPLE X To a solution of 28.2 g. of N-acetyl-N'-tosylethylenediamine, 7.3 g. of potassium hydroride (85%) and 90 ml. of absolute ethanol, there is added 29.3 g. of 2'-br0 momethyl-4-fiuorobenzophenone in small portions with stirring. The reaction mixture is then heated to reflux for thirty minutes and cooled to room temperature. Subsequently, the resulting precipitated salt is removed by filtration, the filtrate concentrated under vacuum, treated with 150 ml. of 2 N sodium hydroxide solution, extracted with ether. Addition of 225 ml. of water to the combined ether extracts causes the slow separation of N-[2-(N-[2- (4-fiuorobenzoyl)benzyl] 4 tolylsulfonamido)ethyl] acetamide.

In a similar manner, N-[2-(N-[2-(4-bromobenzoyl)- S-nitrobenzyl] phenylsulfonamido)ethyl]acetamide; N- [2-(N-[2-(4 propoxybenzoyl)benzyl] phenylsulfonamido)ethyl]acetarnide and N [2-(N-[2-(3-ethoxybenzoyl) 4 trifluoromethylbenzyl] phenylsulfonamido) ethyl]butyramide are produced.

EXAMPLE XI To a solution of 2.0 g. of N-acetyl-N'-n1ethylsulfonyl ethylenediamine, 0.5 g. of sodium hydroxide and 15 m1. of methanol, there is added 3.1 g. of 2-bromomethyl-6- chlorobenzophenone in small portions with stirring. The

reaction mixture is then heated to reflux for forty minutes and cooled to 25 C. The resulting precipitate is removed by filtration, the filtrate concentrated under vacuum, treated with 50 ml. of 2 N potassium hydroxide solution, and extracted with chloroform. Concentration of the combined chloroform extracts causes the separation of N- [2-(N-[Z-benzoyl-3-chlorobenzyl1 methylsulfonamido) ethyl] acetamide.

Similarly, the following compounds are synthesized: N [2-(N-[2-(4-fluorobenzoyl)benzyl] phenylsulfonamido)ethyl]valeramide; and N [2 (N [2-benzoyl-4- fluorobenzyl] -phenylsulfonamido) ethyl] acetamide.

EXAMPLE XII When the procedure of Example XI is repeated employing the appropriate reactants, the following products are obtained: N-[Z-(N-[Z-benzoyl 5 butoxybenzyl1phenylsulfonamido)ethyl]acetamide; N-[Z-(N-[Z-benzoyl 4,5- dibromobenzyl] propylsulfonamido)ethyl]butyramide; N-[Z-(N-[Z-benzoyl 5 trifluoromethylbenzyl]-butylsulfonamidojtethyl]acetamide; and N [2 (N [2,-ben- Zoyl 4 dichloromethylbenzyl]propylsulfonamido)ethyl] acetamide.

EXAMPLE XIII A mixture of 2.5 g. of N-{2-(N-[2-(4-chlorobenzoyl) benzyl] phenylsulfonamido ethyl] acetamide, as prepared in Example I, and 25 ml. of 20% (v./v.) sulfuric acid are heated under reflux for four hours and then allowed to stand overnight at room temperature. The solid cake which separates is Washed with Water several times, then Washed with 50 ml. of ether and filtered under suction. Washing with ether is continued until the filtrate becomes colorless. The product (1.8 g.) obtained in this manner, is recrys tallized three times from Water to alford N-[Z-aminoethyl] N [2-(4-chlorobenzoyl)benzyl]benzenesulfonamide, sulfate, MP. 126128 C.

Analysis.Calcd. for C H ClN O S- /2H SO C, 55.29; H, 4.64; N, 5.86; S, 10.05; Cl, 7.42. Found: C, 55.33; H, 4.66; N, 5.72; S, 10.0; CI, 7.4.

The above prepared N [2 aminoethyl] N [2-(4- chlorobenzoyl)benzyl] benzenesulfonamide, sulfate is then converted to the free amine by treatment with 30% sodium hydroxide solution on a steam bath for fifteen minutes. Thereafter, 1.5 g. of the crude dried N-[Z-aminoethyl[-N-[2-(4-chlorobenzoyl)benzyl] benzenesulfonamide and 0.54 g. of dry pyridine hydrochloride in 600 ml. of pyridine are refluxed for twenty hours. After removing the pyridine by evaporating under reduced pres sure, the product is extracted with ether. The ether extract is then Washed with water three times and dried over anhydrous magnesium sulfate. Evaporation of ether under reduced pressure affords an oil which upon treatment with ethanol yields 0.75 g. of product. Recrystallization from dilute ethanol yields 1-(4-chlorophenyl)-3,4,5,6- tetrahydro 5 phenylsulfonyl-2,5-benzodiazocine, M.P. l15-117 C.

Anaylsis.-Calcd. for CZZHIQCIOQNQS: C, 64.30; H, 4.66; N, 6.82; S, 7.80; Cl, 8.63. Found: C, 64.16; H, 4.40; N, 6.57; S, 7.8; Cl, 8.4.

EXAMPLE XIV The N-[2-(N-[2-(4-chlorobenzoyl)benzyl] 4 tolyl sulfonamide)ethyHacetamide (3.0 g.), as prepared in Example II, is hydrolyzed by refluxing in ml. of 20% (v./v.) sulfuric acid for three hours. The resulting resinous mass is washed with water several times, then with ether until a solid is obtained. Recrystallization of the product from water affords needles of N[2-aminoethyl]- N-[2 (4-chlorobenzoyl)benzyl] 4 toluenesulfonamide, sulfate M.P. l67 C.

Analysis.Calcd. for C23H23ClN2O3S /2H2SO'4I C, 56.14; H, 4.92; N, 5.70; S, 9.78; Cl, 7.21. Found: C, 56.09; H, 4.61; N, 5.70; S, 9.9; Cl, 7.5.

The above prepared N-[Z-aminoethyl]-N-[2-(4-chlorobenzoyl)benzyl]-4-toluenesulfonarnide, sulfate (1.4 g.) is

treated with 30 ml. of 30% sodium hydroxide solution with warming on a steam bath for fifteen minutes. The cake which forms on cooling is washed with water thoroughly and dried, M.P. 6875 C. A pyridine solution obtained by dissolving 1.0 g. of the free amine and 0.36 g. of dry pyridine hydrochloride in 45 ml. of pyridine is refluxed for eighteen hours. After evaporating the pyridine under reduced pressure, the product is extracted with ether which extract is then washed with water and dried over anhydrous magnesium sulfate. Evaporation of the ether solution aifords 0.85 g. of product, which when recrystallized from absolute ethanol affords l-(4-chlorophenyl)- 3,4,5,6 tetrahydro 5 (4tolylsulfonyl) 2,5-benzodiazocine, M.P. 173-l74.5 C.

Analysis.Calcd. fOl' C23H21C1O2N2SZC, H, N, 6.59; S, 7.55; Cl, 8.34. Found: C, 64.85; H, 4.79; N, 6.76; S, 7.5; Cl, 8.4.

EXAMPLE XV The procedure of Examples XIII and XIV is repeated to deacylate and neutralize the amide products of Example III to produce the hereinafter listed sulfolnamides which are then converted to their corresponding 5-sulfonyltetrahydro-Z,S-benzodiazocines.

Sull'onamides Tetrahydro-2,5-benzodiazocines 9-br0mo-3,4,5,6-tetrahydro-5- rnethylsulfonyl-lphenyl2,5- benzodiazocine.

3,4, 5, 6tetrahydro-7-fluoro-5- (4 methoxyphenylsulfonyl)-1- phenyl-2,5-benzodiazocine.

EXAMPLE XVI The N-[2-(N [2benzoylbenzy] propanesulfonamido) ethylJacetamide (5.0 g.), as prepared in Example IV, is hydrolyzed by refluxing in 50 ml. of (v./v.) sulfuric acid for three hours. The resulting mass is then washed with water and chloroform until a solid is obtained. Recrystallization of the product from water affords N-[2- amino ethyl]-N-[2-benzoylbenzyl]-propanesulfonamide, sulfate which is treated with a 20% sodium hydroxide solution at C. for twenty minutes. The resulting solid is Washed with water and dried. The free amine (2.0 g.) is admixed with 0.75 g. of dry pyridine hydrochloride and 90 ml. of pyridine. The mixture is refluxed for thirty hours. Thereafter, the pyridine is removed under reduced pressure, the product extracted with chloroform, the extracts combined, washed with water and dried over anhydrous magnesium sulfate. Evaporation of the chloroform solution and recrystallization of the residue from ethanol yields 3,4,5,6-tetrahydro-1-phenyl-5-propylsulfonyl-2,5- benzodiazocine.

Similarly, deacylatin g N- [2- N- [2- 3 ,4-dichlorobenzoyl) benzyl] 4 chlorophenylsulfonarnido)ethylJvaleramide yields N-[Z-aminoethyl] N-[2-(3,4-dichlorobenzoyl)benzyl]-4-chlorobenzenesulfonamide, sulfate, which is then neutralized and cyclodehydrated to afford 1-(3,4-dichlorophenyl)-5-(4-chlorophenylsulfonyl) 3,4,5,6 tetrahydro- 2,5-benzodiazocine.

EXAMPLE XVII The N [2 (N-[2-(4-bromobenzoyl)benzyl]-4-bromophenylsufonamido)ethyl]acetamide (10.0 g.), as prepared in Example V, is hydrolyzed by refluxing in 300 ml. of 5% (v./v.) ethanolic sodium hydroxide five hours. The mixture is concentrated in vacuo and the resulting mass is washed with water and benzene until a solid is obtained. Recrystallization of the product from water affords N-[Z-aminoethyl] N [2-(4 bromobenzoyl)benzyl] 4- bromobenzenesulfonamide, hydrochloride.

The above prepared sulfonarnide hydrochloride (3.0 g.) is then treated with 0.75 ml. of sodium hydroxide solution at room temperature for thirty minutes. The resulting solid is washed with water, dried and 2.0 g. of the free amine is admixed with 0.72 g. of dry pyridine hydrochloride and 90 ml. of pyridine. The mixture is refluxed for forty hours. Thereafter, the pyridine is removed under reduced pressure, the product is extracted with benzene, the benzene extracts combined, washed with water and dried over anhydrous magnesium sulfate. Evaporation of the benzene solution and recrystallization from methanol yields 1-(4 bromophenyl)-5 (4 bromophenylsulfonyl)- 3,4,5,6-tetrahydro-2,S-benzodiazocine.

Similarly, N-[2 (N-[2 (2,4-dibromobenzoyl)benzyl]- 4-bromophenylsulfonamido)ethyl] propionamide is deacylated and neutralized to form N-[Z-aminoethyl]-N-[2-(2,4- dibromobenzenesulfonamide. Subsequently, this sulfonamide is cyclodehydrated to the corresponding 1-(2,4-diibromophenyl)-5-4-bromophenylsulfonyl) 3,4,5,6 tetrahydro-2,S-benzodiazocine.

Also N [2 (N [Z-furoylbenzyl]-phenylsulfonamido) ethyl]acetamide is converted to N-[2-aminoethyl1-N-[2- furoylbenzyl]benzenesulfonamide which is thereupon cyclized to 1 (2-furyl) 3,4,5,6-tetrahydro-5-phenylsulfonyl- 2,5-benzodiazocine.

EXAMPLE XVIII N [2 (N [2 (4 trifiuoromethylbenzoyl)benzyl]- 4-ethoxyphenylsulfonamido)ethyl1caproamide (25.0 g.), as prepared in Example VI is refluxed in 500 ml. of 10% (v./v.) sulfuric acid for seven hours. The resulting mass is Washed with water and toluene and then recrystallized from Water to yield N-[2-aminoethyl]-N-[2-(4-trifluoromethylbenzoyl 2 naphthoy1)benzyl] 4 ethoxybenzenesulfonamide, sulfate, which is then treated with a 5% potassium hydroxide solution for forty minutes. The resulting solid is washed with water, dried and 5.0 g. of the free amine is admixed with 1.8 g. of dry pyridine hydrochloride and 225 ml. of pyridine. The mixture is refluxed for twenty-five hours. The pyridine is removed under reduced pressure, extracted with ether, the ether extracts are combined, washed with water and dried over anhydrous magnesium sulfate. Evaporation of the ether and recrystallization from ethanol yields 5-(4-ethoxyphenylsulfonyl) 3,4,5,6 tetrahydro l (4 trifluoromethylphenyl)-2,5-benzodiazocine.

In a similar manner, starting with the appropriate amide the following sulfonamides and their corresponding tetrahydro-2,S-benzodiazocines are obtained.

Sulfonamides Tetrahydro-2,5-benzodiazocines N-[2-ami11oethyl1-N-[2-(4-dich1or0- methylbenzoyl)benzyl]ethanesulfonamide.

N -[2-aminoethyl]-N-[2-thenoy1- benzyl]-benzenesulfonamide.

1-(4-dich1oromethylphenyl)-5- ethylsulfonyl-3,4,5,6-tet1'ahydro-2,5-benzodiazocine.

3,4,5,6tetrahydro-fi-phenylsulfonyl-l-thienyl-Z,5-benz0- diazoeine.

EXAMPLE XIX When the procedure of Examples XIII to XIX is employed, reacting the amides from Example VIII as starting materials, the following sulfonamides and their corresponding tetrahydro-2,5-benzodiazocines are obtained.

Sulfonamides Tetrahydro-2,5-bonz0diazocines l0-0hl0ro-3,4,5,6-tetrahydro-5-(4- fluorophenylsulionyl)-1-phenyl- 2,5-benzodiazoeine.

3,4,5,G-tetrahydro-Q-nitro-lphenyl-5-(4-propylphenylsultonyl)-2,5-ben zodiazoeine.

N-[ 2-aminoethyl]-N-[2-benzoyl-4, 5- 8,9-dich10ro-3,4, 5, t'rtetrahydro-ldichloroben zyl]-4:methoxyphenyl-5-(4-methoxyphenylbenzenesulfonamide. sulfonyl)-2,5-benzodiazocine.

N-[Z-aminoethyl]-N-[2-benzoyl4 methoxybenzyH-benzenesulfonamide.

3,4,5,6-tetrahydro-8-methoxy-lphenyl-fi-phenylsulfonyl-2,5- benzodiazocine.

1 1 EXAMPLE xxr N [2 (N [2 (4 nitrobenzoyl)benzyl] phenylsulfonamido)ethyl]acetamide (2.5 g.), as prepared in Example IX, is hydrolyzed by refluxing in 25 ml. of 20% (v./v.) sulfuric acid for four hours. The resulting mass is washed with water and ether until a solid is obtained. Recrystallization of the product from water affords N-[Z- aminoethyl] N [2 (4 nitrobenzoyl)benzyflbenzenesulfonamide, sulfate.

The above prepared sulfonamide sulfate (1.0 g.) is then treated with 0.5 ml. of a 30% sodium hydroxide solution at 25 C. for thirty minutes. The resulting solid is washed with water, dried and 0.5 g. of the free amine is admixed with 0.18 g. of dry pyridine hydrochloride and 25 ml. of pyridine. The mixture is refluxed for twenty-five hours. Thereafter, the pyridine is removed under reduced pressure, the product is extracted with ether, the ether extracts combined, washed with water and dried over anhydrous magnesium sulfate. Evaporation of the ether solution and recrystallization from propanol yields 3,4,5 ,6 tetrahydro 1 (4 nitrophenyl) phenylsulfonyl 2,5- benzodiazocine.

Similarly, employing the above procedure with the appropriate amides as prepared in Example IX, the following sulfonarnides and tetrahydro-2,5-benzodiazocines are prepared.

Sulfonamides N-[2-aminoethyH-N-[Z-ethoxyberglzoyl)benzyllphenylsultonarm e.

N-[2-aminoethyl1-N-[2-(4-dichloromethylbenzoyl) benzyl]-4- toluenesulionamide.

Tetrahydro2,5benzodiazocines 1-(4-ethoxyphenyljI-3,4,5,6-tetrahydro-fi-phenylsulionyl-2,5- benzodiazocine.

1- (4-dichloromethylbenzoyl)- 3,4,5,6-tetrahydm-5-tolylsultonyl-Z,5-benzodiazocine.

EXAMPLE XXII When the procedure of Examples XHI to XXI is employed utilizing as starting material an appropriate amide as prepared in Examples X to XIII, the following products are obtained.

Sulfouamides N-[2-aminoethyl1-N-I2 (N-[Z- (4- fiuorobenzoyl) benzyl1-4 toluenesulfonamide.

N -[2aminoethyl]-N-[2-(4-hromobenzoyl) -5-nitrobenzyl]-benzenesultonamide.

N -(2-aminoethyl) -N-[2 propoxybenzoyl) benzyllphenylsulionw mide.

N-[2-aminoethyl1-N-[2-(3-ethoxybenzoyl)-4-trifiuoromethylbenzyl]-benzenesullonamide.

mlde. N-[2-arninoethyl1-N-[2-benzoyl-5- butoxybenzyl1-benzenesulfonamide. N-[Z-aminoethyl]-N-[2-benzoyl-4,5-

dibromobenzyl1-propanesulfonamide. N-[2-aminoethyl]-N-[2-benzoyl-5- trifiuoromethylbenzylI-butanesulfonamide. N -[2-aminoethyl]-N-[2-benzoyl-4 dichloromethylbenzyl-propanesulfonamide.

Tetrahydro-2,5-benzodiazocines 3,4,5,6-tetrahydro-l-(4-fiuorophenyl)-5-(4-tolylsu1fonyl)-2,5- benzodiazocine. 1-(4-hromophenyl)-3,4,5,B-tetrahydro-8-nitro-5phenylsu1ionyi- 2,5-benzodiazociue. 3,4,5,6tetrahydro-5-phen3 lsultonyl-1-(4-propoxyphenyD' 2,5-benzodiazocine. trifluoromethyl-l-(3-ethoxyphenyl)-3,4,5,6-tetrahydro-5- phenylsulfony1-2,5-henzodiazocine. 1- (4 fiuoropheuyl)-3,4,5,B-tetrahydro-5-phenylsulfonyl-2,5- benzodiazocine. 9fiuoro-3,4,5,6-tetrahydrophenyl-fi-phenylsuh'onyl-Z,5- benzodiazocine. 8-butoxy-3,4,5,6-tetrahydro-1- phenyl-5-phenylsulIonyl-2,5- benzodiazocine. 8,9-dibromo-3,4,5,6-tetrahydro-1 pl]euyl-5propylsulfonyl-2,5 benzodiazoeine. fi-butylsulfonyl-8-t-rifiuoromethyl- 3,4,5,6tetrahydro1-phenyl-2,5- henzodiazocine. 9-dichloromethyl-5-propylsu1r'onyl-3,4,5,6tetrahydro1- phenyl-2,5-benzodiazocine.

EXAMPLE XXIII Analysis.Calculated for C H ClN O S: C, 63.99; H, 5.13; N, 6.77; S, 7.77; Cl, 8.59. Found: C, 63.65; H, 5.02; N, 6.78; S, 8.0; Cl, 8.6.

A mixture of 0.35 g. of 1-(4-chlorophenyl)-l,2,3,4,5,6- hexahydro 5 phenylsulfonyl-2,5-benzodiazocine and 5 ml. of sulfuric acid is warmed in a steam bath until a clear solution forms. Thereafter, the reaction mixture is allowed to stand at room temperature for thirty minutes, quenched with ice water and extracted with ether. The aqueous portion is neutralized with 50% sodium hydroxide solution, extracted with ether and the combined ether extracts are evaporated to dryness. The residual oil is 1 (4-chlorophenyl)-1,2,3,4,5,6-hexahydro-2,5-benzodiazocine which is dissolved in 10 ml. of absolute ethanol and saturated with anhydrous hydrogen chloride. The precipitated solid is separated by filtration and washed thoroughly with ethanol and acetone. After drying, there is obtained 0.4 g. of 1-(4-chlorophenyl)-1,2,3,4,5,6-hexahydro-2,5-benzodiazocine dihydrochloridc, M.P. 318 C. (dec.).

EXAMPLE XXIV Hydrogenation of 0.43 g. of 1-(4-chloropenyl)-3,4,5,6- tetrahydro-5-(4-tolylsulfonyl)-2,5-benzodiazocine as prepared in Example XIII, with the theoretrical quantity of hydrogen at atmospheric pressure using 0.07 g. of platinum oxide affords 0.43 g. of 1-(4-chlorophenyl)-1,2,3,4, 5,6 hexahydro-S-(4-tolylsulfony1)-2,5-benzodiazocine, M.P. 135-437 C.

A mixture of 0.27 g. of the above prepared 1-(4-chlorophenyl) 1,2,3,4,5,6 hexahydro-S-(4-tolylsulfonyl)-2,5- benzodiazocine and 2.5 ml of 90% sulfuric acid is warmed in a steam bath until a clear solution forms and is then allowed to stand at room temperature for thirty minutes. Thereafter, the solution is quenched with ice water and extracted with ether. The aqueous portion is neutralized with 50% sodium hydroxide solution, extracted with ether and the combined ether extracts are evaporated to dryness. The residual oil is dissolved in 5 ml. of absolute ethanol and saturated with anhydrous hydrogen chloride. The precipitated solid is separated by filtration and washed thoroughly with ethanol and acetone. After drying, there is obtained 0.2 g. of 1-(4-chlorophenyl)-1,2,3,4, 5,6-hexahydro-2,5-benzodiazocine dihydrochloride, M.P. 318 C. (dec.).

EXAMPLE XXV 5sulfonyl-hexahydro- 2,5-benzodiazocines Hexahydr0-2,fi-benzo'diazocines 9-bromo1,2,3,4,5,6-hexahydro- 9-brorno-l,2,3,4,5,6-hexahydro- 5-methylsultonyl-1-phenyl-2,5- l-phenyl-Z,a-henzodiazociue. benzodiazocine.

fluoro-5-(4-methoxyphenylsulfonyl)-1-phenyl-2,5- benzodiazocine.

EXAMPLE XXVI A mixture of 3,4,5,6-tetrahydro-l-phenyl-S-propylsulfonyl-2,5-benzodiazocine (0.5 g.), as prepared in Ex- 5 ample XVI, in 50 ml. of methanol containing 0.1 g. of

platinum oxide is contacted with hydrogen under reduced pressure until the 'hydroganation is complete. After removing the catalyst by filtration, the solution is evapo rated to dryess and the residue recrystallized from metha- 1101 to afford 1,2,3,4,5,6-hexahydro-1-phenyl5-propylsulfonyl-Z,S-benzodiazocine.

A mixture of 0.25 g. of the aforesaid sulfonylhexahydrobenzodiazocine and 2.0 ml. of sulfuric acid is heated to 60 C. until solution is complete and then allowed to stand at room temperature for three hours.

Thereafter, the reaction mixture is neutralized with a 30% potassium hydroxide solution, extracted with chloroform and the combined extracts are evaporated to dryness. The residue is 1,2,3,4,5,6-hexahydro-1-phenyl-2,5- benzodiazocine.

Similarly, hydrogenating 1-(3,4-dichlorophenyl)-3,4,5, 6 tetrahydro-S-(4-chlorophenylsulfonyl -2,5-benzodiazocine yields 1-(3,4-dichlorophenyl)1,2,3,4,5,6-hexahydro- -(4-chlorophenylsulfonyl)-2,5-benzodiazocine which is then desulfonated to afford 1-(3,4-dichlorophenyl)-1,2,3, 4,5,6-hexahydro-2,S-benzodiazocine.

EXAMPLE XXV II A mixture of 1-(4-bromophenyl)-5-(4-bromophenylsulfonyl)-3,4,5,6-tetrahydro-2,5-benzodiazocine (1.0 g.), as prepared in Example XVII, in 100 ml. of ethanol containing 2.0 g. of palladium on charcoal is placed under a hydrogen atmosphere for four hours. Thereafter, the catalyst is removed by filtration, the solution is evaporated to dryness and the residue recrystallized from ethanol to obtain 1-(4-bromophenyl)-5-(4-bromophenylsulfonyl)-1,2,3,4,5,6-hexahydro-2,S-benzodiazocine.

A mixture of 0.5 g. of the aforesaid sulfonyl hexahydrobenzodiazocine and 4.0 ml. of 95% sulfuric acid is heated to 80 C. until solution is complete and then allowed to stand at room temperature for two hours. Thereafter, the reaction mixture is neutralized with 2 N sodium hydroxide solution, extracted with ether and the combined extracts are evaporated to dryness. The residue is 1-(4-bromo phenyl) -1 ,2,3 ,4,5 ,6-hexahydro-2,5-benzodiazocine.

Similarly, 1-(2,4-dibromophenyl)-5-(4bromophenylsulfonyl)-3,4,5,6-tetrahydro-2,S-benzodiazocine is hydrogenated and desulfonated to yield 1-(2,4-dibromophenyl)- 1,2,3,4,5,6-hexahydro-2,5-benzodiazocine.

EXAMPLE XXVIII Dimethylamino-borane (1.8 g.) in ml. of glacial acetic acid is slowly added with stirring at 20 C. to 20 ml. of glacial acetic acid containing 5-(4-ethoxyphensulfonyl) 2,4,5,6 tetrahydro 1 trifluoromethylphenyl 2,5-benzodiazocine. When the addition is complete, the reaction mixture is refluxed for fifteen minutes, cooled and admixed with cold water until precipitation is com plete. Thereafter, the precipitate is filtered, washed with Water and dried to afford 5-(4-ethoxyphenylsulfonyl)-1,2, 3,4,5,6 hexahydro 1 (4 trifluoromethylphenyl) 2,5 benzodiazocine.

A mixture of 5.0 g. of the above prepared sulfonylhexahydrobenzodiazocine and ml. of 90% sulfuric acid is heated to 100 C. until solution is complete and then allowed to stand at room temperature for thirty minutes. Thereafter, the reaction mixture is neutralized with 3 N sodium hydroxide solution, extracted with benzene and the combined extracts are evaporated to dryness. Th residue is dissolved in 10 m1. of absolute ethanol and saturated with hydrogen chloride to yield 1,2,3,4,5,6- hexahydro 1 (4 trifluoromethylphenyl) 2,5 benzodiazocine dihydrochloride.

Similarly, starting with the appropriate 5-sulfonyl-tetrahydro-2,S-benzodiazocines the following 5-sulfonyl-hexahydro-2,5-benzodiazocines and hexahydro-2,5-benzodiazocines are obtained.

5-sulfonyl-hexahydro- 2,5-benzodiaz0cines 1(4-dichloromethylphenyl)- 5-ethylsulfonyl-12,3,45,6- hexahydro-2,5-benzodiazoeine.

1,2,3,4,5,6-hexahydro-5-phenylsultonyl1thienyl-2,5-benz0- diazoeine.

Hexahyd1'o-2,5-benzo-diazocines l-(4-diehloromethylphenyl)- 1,2,3,4,5,6hexahydro-2,5- benzodiazocine.

1,2,3,4,5,6 hexahydr0 1- thienyl-2,5-benzodiazocine.

EXAMPLE XXIX heated under reflux for two hours. Thereafter, the reaction mixture is admixed with 75 ml. of a water-tetrahydrofuran mixture and 30 ml. of a 10% sodium hydroxide solution. The resulting mixture is filtered and the filtrate dried over magnesium sulfate. The filtrate is evaporated to dryness and the residue crystallized from ethanol to afford 5 phenylsulfonyl 1,2,3,4,5,6 hexahydro 1-(4- methoxyphenyl -2,5-benzodiazocine.

A mixture of 2.5 g. of the above prepared sulfonylhexahydrobenzodiazocine and 20 ml. of sulfuric acid is heated to 70 C. until solution is complete and then allowed to stand at room temperature for thirty minutes. Thereafter, the reaction mixture is neutralized with 2 N sodium hydroxide solution, extracted with ether and the combined extracts are evaporated to dryness. The residue is 1,2,3,4,5,6 hexahydro 1 (4 methoxyphenyl) 2,5 benzodiazocine.

EXAMPLE XXX 5-sulfonyl-hexahydro- 2,5-benz0diazocines 10-chloro1,2,3,4,5,6-hexahydr0- 5-(4-fiu0rophenylsulfonyl)-1- phenyl-2,s-benzodiazocine. 1,2,3,4,5,6-hexahydro-9- methyl-1-phenyl-5-(i-propylphenylsulfonyl)-2,5- benzodiazocine. 8,9diehloro-1,2,3,4,5,6-

hexahydro1-phenyl-5-(4- methoxyphenylsulfonyD- 2,5-benzodiazocine. 1,2,3,4,5,6 hexahydro-8- methoxy-l-phenyl-S-phenylsultonyl2,5-benzodiazocine.

I-Iexaltydro-2,5-benzo-diazocines IO-chloro-l,2,3,4,5,6-hexahydro1-phenyl-2,fi-benzodiazocine.

1,2,3,4,5,6-hexahydro-9- methyH-phenyl-2,5-benzodiazocine.

8,9-diehloro-1,2,3,4,5,6-

hexahydro-bphenyl-l5-benzodiazocine.

1,2,3,4,5,6 hexahydr0-8-methoxy- 1-phenyl-2,5-benzodiazocine.

EXAMPLE XXXI A solution of 40.0 g. of 3,4,5,6-tetrahydro-1-(4-nitrophenyl) -5-phenylsulfonyl-2,5-benzodiazocine in 200 ml. of methanol containing 0.7 g. of platinum oxide is allowed to absorb the theoretical quantity of hydrogen under reduced pressure. After removing the catalyst by filtration, the solution is evaporated to dryness and the residue recrystallized from ethanol and water to afford 1,2,3,4,5,6- hexahydro 1 (4 aminophenyl) 5 phenylsulfonyl 2,5-benzodiazocine.

A mixture of 20.0 g. of the aforesaid sulfonylhexahydrobenzodiazocine and 200 ml. of 80% sulfuric acid is heated to C. until the solution is complete and then allowed to stand at room temperature for five hours. Thereafter, the reaction mixture is neutralized with 4 N sodium hydroxide solution, extracted with ether and the combined extracts are evaporated to dryness. The residue is 1,2,3,4,5,6-hexahydro-1-(4-aminophenyl)-2,5-benzodiazocine.

Similarly, employing the aforesaid procedure, the following 5-sulfonyl-hexahydro-2,5-benzodiazocines and hexahydro-2,5-benzodiazocines are prepared.

5-sulIonyl-hexahydro- 2,5-benzodiazocines 1-(4-eth0xyphenyl)1,2,3,4,5,6-

hexahydro-5-phenylsulfonyl- 2,5-benzodiazocine.

1-(4-dichloromethylbenzoyl)- 1,2,3,4,5,6-hexahydro-5- phenylsulfonyl-2,5-benzodiazoeine.

Hexahydro-Z,fi-benzo-diazocines 1-(4-ethoxyphenyl)-1,2,3,4,5,6-

hexahydro-2,5-benzodiazocine.

1-(4-dichl0r0methylphenyl)-1,2, 3.4,5,6-hexahydro-2,5-benzodlazocine.

EXAMPLE XXXII 5-sulfonyl-hexahydro- 2,5-benzodiazocines Hexahydro-2,5-benzo-diazoeines 1,2,3,4,5,6-heXahydro-1-(4 fiuorophenyl) -2,5-bemodiazocine.

1,2,3,4,5,6-hexahydro-1-(4 propoxyphenyl)-2,5benzodiazocine.

9-trifiuoromethyl-1-(3-et-hoxypheuyl)-1,2,3,4,5,,6hexabydro-2,5-benzodiazocine.

l-chloro-1,2,3,4,5,S-hexahydro-1-phenyl-2,5-benzodiazocine.

1-(4-fluorophenyl)-1,2,3,4,5,6-

hexahydro-2,5-benzodiazocine.

Q-fluoro-l,2,3,4,5,6-hexahydro-l-phenyl-2,5-benzodiazocine.

8-butoxy-1,2,3,4,5,6-hexahydrol-phenyl-2,5-benzodiazocine.

8,9-dibr0m0-1,2,3,4,5,6-hexahydro-1-phenyl-2,5-benzodiazocine.

S-trifluoromethyl-l,2,3,45,6- hexahydro-l-phenyl-2,5- benzodiazocine.

9-diehloromethyld,2,3,4,5,6-

hexahydro-l-phenyl-2,5-benzohexahydro-1-phenyl-2,5- diazocine.

benzodiazoeine.

What is claimed is: 1. A compound selected from the group consisting of those having the formula:

wherein R is selected from the group consisting of phenyl, lower alkoxyphenyl, nitrophenyl, aminophenyl, halophenyl, halo(lower)alkylphenyl, thienyl and furyl; R and R are both selected from the group consisting of hydrogen, halogen, lower alkoxy, nitro, amino and halo(lower) alkyl; and R is selected from the group consisting of lower alkyl, phenyl, lower alkylphenyl, lower alkoxyphenyl and halophenyl.

2. A compound as described in claim 1 which is: 1-(4- chlorophenyl) 3,4,5,6 tetrahydro 5 phenylsulfonyl- 2,5-benzodiazocine.

3. A compound as described in claim 1 which is: 1-(4- chlorophenyl) 3,4,5,6 tetrahydro 5 (4 tolylsulfonyl) -2,S-benzodiazocine.

4. A compound as described in claim 1 which is: 3,4, 5,6 tetrahydro 1 phenyl 5 propylsulfonyl 2,5,- bonzodiazocine.

5. A compound as described in claim 1 which is: 1-(4- bromophenyl) 5 (4 bromophenylsulfonyl) 3,4,5,6- tetrahydro-Z,S-benzodiazocine.

6. A compound selected from the group consisting of those having the formula:

wherein R is selected from the group consisting of phenyl, lower alkoxyphenyl, aminophenyl, halophenyl, halo(lower)alkylphenyl, thienyl and furyl; R and R are both selected from the group consisting of hydrogen, hal ogen, lower alkoxy, amino, and halo(lower)alkyl; R is l cted from he gro p consisting of lower alkyl, phen l,

16 lower alkylphenyl, lower alkoxyphenyl and halophenyl, and the acid addition salts thereof.

7. A compound as described in claim 6 which is: 1-(4- chlorophenyl) l,2,3,4,5,6 hexahydro 5 phenylsulfonyl-2,S-benzodiazocine.

8. A compound as described in claim 6 which is: 1-(4- chlorophenyl)-l,2,3,4,5,6-heXahydro-5-(4 tolylsulfonyD- 2,5-benzodiazocine.

9. A compound as described in claim 6 which is: 1,2,3, 4,5,6-hexahydro-l-phenyl-S-propylsulfonyl 2,5 benzodiazocine.

10. A compound as described in claim 6 which is: l-(4- bromophenyl)-5-(4 bromophenylsulfonyl) l,2,3,4,5,6- hexahydro-Z,S-benzodiazocine.

11. A process for the production of a compound selected from the group consisting of those having the formula:

wherein R is selected from the group consisting of phenyl, lower alkoxyphenyl, aminophenyl, halophenyl, halo(lower)alkylphenyl, thienyl and furyl; R and R are both selected from the group consisting of hydrogen, halogen, lower alkoxy, amino, and halo(lower)alkyl; which comprises:

(a) condensing a Z-bromomethylbenzoyl compound of the formula:

HB 3 G 2 1' R2 0:0

wherein R R and R are defined as above, with the proviso that R can also be nitrophenyl and that R; and R can also be nitro, with a N-acyl-N-sulfonylethylenediamine compound of the formula:

SOQRA (I? HN CHzCHzNHCR wherein R is lower alkyl and R is selected from the group consisting of lower alkyl, phenyl, lower alkylphenyl, lower alkoxyphenyl and halophenyl in an alkanol, in the presence of an alkaline alkylating agent, at a temperature range from about 60 C. to about C. for a period of about one-half hour to about five hours; to form a N-[2-(N-[2-carbonyl benzyl]-sulfonamido)ethyl]amide of the formula:

wherein R, R R R and R are defined as above, with the proviso that R can also be nitrophenyl and that R and R; can also be nitro;

(b) deacylating said N-[Z-(N-[2-carbonylbenzyl1-sulfonamido) ethyl] amide by contact with a mineral acid at about reflux temperatures for a period of about three to about eight hours to form the mineral acid salt of a N-[Z-aminoethyl]-N-[2-carbonylbenzyl1sulfonamide of the formula:

1 7 wherein R R R and R are defined as above, with the proviso that R can also be nitrophenyl and that R and R can also be nitro;

(c) neutralizing said mineral acid salt to form the corresponding N-[2-aminoethyl]-N-[Z-carbonylbenzyl] sulfonamide;

(d) cyclodehydrating said sulfonamide by contact with pyridine hydrochloride in pyridine at about reflux temperatures for a period of about twenty to about forty hours to form a 5-sulfonyl-tetrahydro-2,S-benzodiazocine of the formula:

wherein R R R and R are defined as above, with the proviso that R can also be nitrophenyl and that R and R can also be nitro;

(e) hydrogenating said tetrahydro-2,5-benzodiazocine,

in the presence of a reducing agent to form a S-sulfonyl-hexahydro-2,5-benzodiazocine of the formula:

wherein R R R and R are defined as above;

(f) desulfonating said 5-sulfonyl-hexahydro-2,S-benzodiazocine by contact with concentrated sulfuric acid.

12. A process as described in claim 11 wherein:

(a) the alkylating procedure is conducted in the presence of an alkaline condensing agent which is selected from the group consisting of sodium hydroxide and potassium hydroxide;

(b) the deacylating procedure is conducted by contact with sulfuric acid; and

(c) the hydrogenating procedure is conducted by contact with hydrogen, in the presence of platinum oxide.

13. A process as described in claim 11 for the production of 1-(4-chlorophenyl) 1,2,3,4,5,6 hexahydro-2,5- benzodiazocine which comprises:

(a) alkylating 2'-bromomethy1-4-chlorobenzophenone with N-acetyl-N'-benzenesulfonylethylenediamine in ethanol, in the presence of potassium hydroxide at about reflux temperatures for about thirty minutes, to form N-[2- (N-[2-(4-chlorobenzoyl)benzyl] -ben- Zeuesulfonamido) ethyl] acetamide;

(b) deacylating said N-[2-(N-[2-(4-chlorobenzoyl) benzyl] benzenesulfonamido)ethyl]acetamide by contact with sulfuric acid at about reflux temperatures for about four hours to form N-[Z-aminoethylfj-N-[2-(4 chlorobenzoyl)benzyl]-benzenesulfonamide, sulfate;

(0) neutralizing said N-[Z-aminoethyl] N [2-(4- chlorobenzoyl)benzyl]benzenesulfonamide, sulfate with sodium hydroxide, to form N-[2-aminoethyl]- N-[2-(4 chlorobenzoyl)benzyl] benzenesulfonamide;

(d) cyclodehydrating said N-[2-aminoethyl]-N-[2-(4- chlorobenzoyl)benzyl]-benzenesulfonamide by contact with pyridine hydrochloride in pyridine at about reflux temperatures for about twenty hours, to form 1-(4-chlorophenyl)3,4,5,6-tetrahydro 5 phenylsulfony1-2,S-benzodiazocine;

(e) hydrogenating said 1-(4 chlorophenyl)-3,4,5,6-

tetrahydro-5-phenylsulfonyl 2,5 benzodiazocine by contact with hydrogen in the presence of platinum oxide, to form 1-(4-chlorophenyl)-1,2,3,4,5,6-hexahydro-5-phenylsulfonyl-2,S-benzodiazocine; and

(f) desulfonating said 1-(4-chlorophenyl)-1,2,3,4,5,6-

hexahydro-S-phenylsulfonyl 2,5 benzodiazocine by contact with concentrated sulfuric acid.

14. A process as described in claim 11 for the production of 1-(4-chlorophenyl) 1,2,3,4,5,6 hexahydro-2,5- benzodiazocine which comprises:

(a) alkylating 2'-bromomethyl-4-chlorobenzophenone with N-acetyl-N'-tosylethylenediamine in ethanol in the presence of potassium hydroxide at about reflux temperatures for about thirty minutes, to form N- [2-(N-[2-(4 chlorobenzoyl)benzyl] tolylsulfonamido ethyl] acetamide;

(b) deacylating said N-[2-(N-[2-(4-chlorobenzoyl) benzyl]-tolylsulfonamido) ethy1]acetamide by contact with sulfuric acid at about reflux temperatures for about four hours to form N-[2-aminoethyl]-N- [2-(4-chlorobenzoyl)benzyl] 4-toluenesulfonamidesulfate;

(c) neutralizing said N-[Z-aminoethyl] N [2-(4- chlorobenzoyl)benzyl]-4-toluenesulfonamide, sulfate, with sodium hydroxide, to form N-[2-aminoethyl]- N- [2- 4-chlorobenzoyl benzyl] -4-tolylsulfonamide;

(d) cyclodehydrating said N-[2-aminoethyl]-N-[2-(4- chlorobenzoyl)benzyl]-4-toluenesulfonamide by contact with pyridine hydrochloride in pyridine at about reflux temperatures for about twenty hours, to form 1-(4-chlorophenyl) 3,4,5,6 tetrahydro-5-(4-toly1- sulfonyl)-2,5-benzodiazocine;

(e) hydrogenating said 1-(4 chlorophenyl)-3,4,5,6-

tetrahydro-S-(4-tolylsulfonyl)-2,5-benzodiazocine by contact with hydrogen in the presence of platinum oxide, to form 1-(4-chlorophenyl)-1,2,3,4,5,6-hexahydro-S-(4-tolylsulfonyl)-2,5-benzodiazocine; and

(f) desulfonating said 1-(4-chloropheny1)-1,2,3,4,5,6-

hexahydro-S-(4-to1ylsulfonyl)-2,5-benzodiaz0cine by contact with concentrated sulfuric acid.

References Cited FOREIGN PATENTS 1,093,064 11/1967 Great Britain.

ALEX MAZEL, Primary Examiner BERNARD DENTZ, Assistant Examiner US. Cl. X.R. 

